mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Bastian Köcher
dc190a69f2
* Move AuRa digest from client to primitives This makes the digest stuff usable from inside the runtime ;) * Update primitives/runtime/src/generic/digest.rs Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com> * Review feedback * Make BABE use the new functionality Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>
65 lines
2.2 KiB
Rust
65 lines
2.2 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2018-2021 Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//! Aura (Authority-Round) digests
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//!
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//! This implements the digests for AuRa, to allow the private
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//! `CompatibleDigestItem` trait to appear in public interfaces.
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use crate::AURA_ENGINE_ID;
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use sp_runtime::generic::DigestItem;
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use sp_consensus_slots::Slot;
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use codec::{Encode, Codec};
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use sp_std::fmt::Debug;
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/// A digest item which is usable with aura consensus.
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pub trait CompatibleDigestItem<Signature>: Sized {
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/// Construct a digest item which contains a signature on the hash.
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fn aura_seal(signature: Signature) -> Self;
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/// If this item is an Aura seal, return the signature.
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fn as_aura_seal(&self) -> Option<Signature>;
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/// Construct a digest item which contains the slot number
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fn aura_pre_digest(slot: Slot) -> Self;
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/// If this item is an AuRa pre-digest, return the slot number
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fn as_aura_pre_digest(&self) -> Option<Slot>;
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}
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impl<Signature, Hash> CompatibleDigestItem<Signature> for DigestItem<Hash> where
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Signature: Codec,
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Hash: Debug + Send + Sync + Eq + Clone + Codec + 'static
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{
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fn aura_seal(signature: Signature) -> Self {
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DigestItem::Seal(AURA_ENGINE_ID, signature.encode())
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}
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fn as_aura_seal(&self) -> Option<Signature> {
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self.seal_try_to(&AURA_ENGINE_ID)
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}
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fn aura_pre_digest(slot: Slot) -> Self {
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DigestItem::PreRuntime(AURA_ENGINE_ID, slot.encode())
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}
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fn as_aura_pre_digest(&self) -> Option<Slot> {
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self.pre_runtime_try_to(&AURA_ENGINE_ID)
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}
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}
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